Title

The mystery of growing yogurt.

Problem Scenario

Does yogurt culture grow at a temperature?

Specific Question

At what temperature does yogurt culture grow best.

Hypothesis

I think that the cup with the most yogurt will make the marble float to the top.
Maybe the cup with 100 f will be more deep.

Graph of Hypothesis

Variables

Temperature

Dependent Variable:

How deep the marble sinks

Variables That Need To Be Controlled:

Container,amount of milk,yogurt,home made ruler,amount of yogurt

Vocabulary List That Needs Explanation

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General Plan

1. Have to make the yogurt.
2. Put the yogurt in different temperatures and cups.
3. then drop the marble in all cups.

Potential Problems And Solutions

1.the plate may not heat up to the correct temp.
a.try to find a new plate that works.
2.the yogurt may be bad.
a.i might have to buy new yogurt.
3.my measurements might be off.
a.I could right down how im going to do it.

Safety Or Environmental Concerns

Not burning themselves
not hurting themselves

Resources and Budget Table

Item	Where to get this	Cost
Poster Board	store
Milk	Mr.Biche	$0
Yogurt	Mr.Biche	$0
Cups	Mr.Biche	$0
Incubator	Mr.Biche	$0
Marble	Mr.Biche	$0

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Background Research

yogurt is good for you.According to medical news today it provides 400 mg of calcium.did you know that yogurt has as much potassium as a banana and as much protein as a egg.common bacteria in this project is streptococcus,lactobacillus delbruekii ,lactobacillus Acidophilus and bifidobacterium.

References

Detailed Procedure

1. heat milk up to 185
2. cool milk to 110
3. let starter yogurt sit at room temp while waiting for the milk to cool
4. add dry milk if desired
5. add starter
6. put mixture in containers
7. allow yogurt bacteria to incubate
8. refrigerate yogurt

Diagram

Photo List

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Results

All Raw Data

room temp	100f
3.5	0.5
3	1
3.5	0.5
4	0.3
3.5	1
4	1
3.5	1.1

Graphs

Photos

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Data Analysis

Conclusion

After doing my experiment I realized that my hypothesis was wrong.In fact it was completely opposite.I thought that the cup with the yogurt at at the top will make the marble float to the top.on my hypothesis graph my room temp was on 12 but in the experimental graph it was on

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Discussion

My project came out well but I think

• I could improve the quality of my project by using better tools.
• I could improve the quality of my project by using better brand milk.
• I could improve the quality of my project by measuring from a higher distance.
• The benefit of doing my research is to to learn about whats in the yogurt and how its made.

I would recommend next is measuring the growth of yogurt to see how fast it grows.

Benefit to Community and/or Science

my project is important because you could learn all of the basic,how good yogurt is good for you,how to make and whats the
bacteria.

1. a healthier source instead of buying it at the store.
2. to teach people to make yogurt.
3. whats in the yogurt.

abstract

the main idea of my project was to see how deep a marble would sink in 100 degrees yogurt.i found that at room temp the marble sink all the way to the bottom due to watery yogurt.at a 100 d. the marble stayed at the top.